html {
  font-size: 10px;
}

body {
  font-size: 1.6rem;
}

.table {
  border-collapse: collapse;
  border-spacing: 0;
  margin: 0 auto;
  user-select: none;
}

th,
td {
  border: 0.1rem solid #ddd;
  padding: 0.5rem;
  width: 8rem;
  height: 4rem;
  vertical-align: middle;
  overflow: visible;
  box-sizing: border-box;
}

thead tr {
  background-color: #ddd;
}